Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting. - continued

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Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting. - continued

TM-55-1905-220-14-8 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

Table 4-7. Air Conditioner Erratic Operation Troubleshooting.

TM 55-1905-220-14-8

4-5. GENERAL (Continued).

Table 4-6. Air Conditioner Abnormal Operating Pressures/Temperatures - Troubleshooting (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

6. High crankcase temperature (exceeds 105180 at seal housing).

Step 1. Clogged liquid line strainer.

Pump down. Remove and clean strainer.

Step 2. Excessive superheat.

Reset thermal expansion valve(s) to 810 superheat.

Step 3. Leaking compressor suction or discharge valves.

Pump down, remove cylinder heads and examine suction and discharge valves. Replace if

necessary.

Step 4. Discharge temperature exceeds 240 .

By-pass heat interchanger.

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